When Aliens Attack Scientists are apparently war-gaming an alien attack on Earth. Given the advanced technology our visitors would possess just to travel here, our weapons (see “The World’s Biggest Bomb” above) aren’t going to make much of an impression. The alien sociology data set is very small – compiled mostly at that secret research facility in Nevada and interviews with nocturnal probe victims -- so let’s hope that the first visitors are friendly. “It’s alien sociology, and we don’t know what is going to happen,” said Dr. Travis Taylor, author of “An Introduction to Planetary Defense” who’s worked for NASA and the Department of Defense, during the Winter TV Tour in Hollywood. “We don’t know what they are, because it’s alien. And we have no data to say one way or the other. But what we do know is that there are a lot of stars, and a lot of planets, and a potential for there to be aliens. And it should be as statistical as human nature, for example, that there’s going to be good guys and bad guys. What we would hope is that the good guys show up first, and that would be really nice. But the point of this wasn’t to debate whether they are or they aren’t. It’s what happens if (it’s the bad guys). Do we have a plan? What type of plan should we put together, and how would we defend the planet?” 7 p.m. National Geographic